I did worked in Yemen before.. Year 2007 if I am not mistaken.. Though it was in Balhaf.. My friendly advice, be alert and always respect the custom they have.. Also, I assumed you have studied Yemen before you go there.. I still remember my first day there.. something like a vip in the movie scene.. A driver and a military man and you in a land cruiser + 2 military truck with soldier in front of you car and another 2 on you back..They served as your escorts..Be safe always...